TPA3137D2 Datasheet, PDF (1/35 Pages) Texas Instruments – TPA3137D2 6-W Inductor Free Stereo (BTL) Class-D Audio Amplifier with Ultra Low EMI

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TPA3137D2
SLOS956A – JUNE 2016 – REVISED JUNE 2016
TPA3137D2 6-W Inductor Free Stereo (BTL) Class-D Audio Amplifier with Ultra Low EMI
1 Features
•1 2 × 6 W/ch into 6-Ω Loads at 10% THD+N from a
12-V Supply
• 2 × 6 W/ch into 8-Ω Loads at 10% THD+N from a
13-V Supply
• Up to 90% Efficient Class-D Operation (8 Ω)
Eliminates Need for Heat Sinks
• <0.05% THD+N at 1 W/4 Ω/1 kHz
• Wide Supply Voltage Range Allows Operation
from 4.5 V to 14.4 V
• Inductor-Free Operation
• Enhanced EMI Performance with Spread
Spectrum
• SpeakerGuard™ Speaker Protection Includes
Power Limiter and DC Protection
• Robust Pin-to-Pin, Pin-to-Ground, and Pin-to-
Power Short Circuit Protection and Thermal
Protection
• 26-dB Fixed Gain
• Single-Ended or Differential Analog Inputs
• Click and Pop Free Startup
3 Description
The TPA3137D2 device is an efficient, Class-D audio
power amplifier for driving bridged-tied stereo
speakers at up to 6 W, 6 Ω, or 8 Ω (per channel).
Advanced EMI Suppression Technology with Spread
Spectrum Control scheme enables the use of
inexpensive ferrite bead filters at the outputs while
meeting EMC requirements for system cost reduction.
The TPA3137D2 device is not only fully protected
against shorts and overload, the SpeakerGuard™
speaker protection circuitry includes a power limiter
and a DC detection circuit for protection of the
connected speakers. The DC detect and Pin-to-Pin,
Pin-to-Ground, and Pin-to-Power Short Circuit
protection circuit protect the speakers from output DC
and pin shorts caused in production. The outputs are
also fully protected against shorts to GND, PVCC,
and output-to-output. The short-circuit protection and
thermal protection includes an auto recovery feature.
The TPA3137D2 device can drive stereo speakers
with as low as 4-Ω impedance. The high efficiency of
the TPA3137D2, 90% with an 8-Ω load, eliminates
the need for an external heat sink, and TPA3137D2
will be able to output full power on a 2-layer PCB.
2 Applications
• Televisions
• Bluetooth/Wireless Speakers
• Mini Speakers
• USB Speakers
• Consumer Audio Equipment
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPA3137D2
HTSSOP (28)
9.70 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
RIGHT
Audio
Source
LEFT
And Control
TPA3137D2
TAS5630
SD
FAULT
Ferrite
Bead
Filter
Ferrite
Bead
Filter
PBTL Mode Select
Power Limiter Threshold Select
PBTL
SELECT
PLIMIT
Power Supply
4.5V-14.4V
110VAC->240VAC
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.